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4 April 2022 Beam hardening artifacts in computed tomography: comparison of photon-counting and energy-integrating detectors
Thomas W. Holmes, Bernhard Schmidt, Thomas Flohr, Stefan Ulzheimer, David A. Bluemke, Amir Pourmorteza
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Proceedings Volume PC12031, Medical Imaging 2022: Physics of Medical Imaging; PC120310M (2022) https://doi.org/10.1117/12.2613178
Event: SPIE Medical Imaging, 2022, San Diego, California, United States
Abstract
We compared CT x-ray beam-hardening artifacts in a hybrid scanner with energy-integrating detectors (EID) versus photon-counting detectors (PCD) subsystems. EID-CT images had less beam hardening artifacts compared to PCD-CT images for x-ray tube voltages 120 kVp and higher. We further demonstrated that the inherent spectral information of PCDs can be used to effectively eliminate beam-hardening artifacts.
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Thomas W. Holmes, Bernhard Schmidt, Thomas Flohr, Stefan Ulzheimer, David A. Bluemke, and Amir Pourmorteza "Beam hardening artifacts in computed tomography: comparison of photon-counting and energy-integrating detectors", Proc. SPIE PC12031, Medical Imaging 2022: Physics of Medical Imaging, PC120310M (4 April 2022); https://doi.org/10.1117/12.2613178
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KEYWORDS
Sensors
Photodetectors
Computed tomography
X-ray detectors
X-rays
Image filtering
Optical simulations
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